Infiniti I30/I35Similar to a Maxima, yet not really a Maxima. Discussion forum on Nissan's luxury model, the Infiniti I30/I35

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spark plug recommendations

I need to replace the spark plugs on my wife's 99 I30. Which spark plugs would ya recommend. I know NGKs are good, but which NGKs? I believe the factory plugs are PFR5G-11's, but they are a bit pricey. Anyone know of a good cheaper alternative? Or should I just bite the bullet and pay the money for them?

My car was getting detonation problems in the begining... and since i had to change my plugs at 60.000miles, chose to go with the coldest type... Also i did the advanced timing mod so i thought that causes the problem. I mean the knocking/rattle noise under acceleration... Actually one of the coils was going bad and after replacing it the problem is gone... But like i said above - i'm happy with these NGKs

Holy cow! Maybe I could sell them to you from here and list them as "Christmas ornaments" on the customs forms, just in case.

Yeah, you're kidding, but you can't imagine how the parts are expensive here For example - one OEM coil costs 4.000kc = $200 and the NGKs price, what i mentioned above is w/o the 19% tax!
Sorry for the OT

I've also had very good luck with Bosch Platinum +4's. I cannot recommend any of the other Bosch plugs, though, and I understand why some people have had problems with them. However, they got it right with the +4's.

Now, they have a new line of +4's with Iridium called Fusion, I believe. I wonder if anyone here is running them.

This topic has been discussed since Noah built his ark...
NGK Coppers if you want to change'em every 25k miles or so, platinum 60-80k (tho nissan says 100k)
index the spark plugs -> GOOGLE IT
go a step colder if you do alot of higway
hotter for city -> SEARCH IS YOUR FRIEND

I put a set of fusion in and didn't really notice to much of a difference however after 50,000 miles I decided to change them out and go with NGK's (platinum). I was getting on a entrance ramp and decided to floor it through the gears and noticed smoke coming out the back. What would cause that? It wasn't smoking with the fusions. This only happens at full throttle. The person at O'Reileys told me these plugs were pre-gaped. Is this true? The digits on the NGK box are are BKR5EGP 7090. Is that the correct plug?

I flirted with Iridiums in a '99 I30. Idling weirdness crept in. Switched back to OEM platinums and haven't looked back since. And don't wait 100k to replace them. They may not come out of the block so easily after that period of time.
Change around 60k. That is all.

I might also add that b/f the iridiums, I was running Bosch Platinum +4's for the first 70K, and they worked for me nicely (and, yes, I heard all about the bad rap for Bosch, and I can vouch for that it their other plugs, but I am convinced that the +4's are not part of that bad bunch).

I really didn't need to replace them when I did, as the car ran fine and they came out looking like the "normal" photos in the Chilton comparison chart. Same-same for the +4's I ran in my 3rd Gen Max, except that I put 110k on them b/f changing them.They also looked evenly coated, but the electrode had worn down making the gap wider. IMHO, the car actually ran better when the gap was wider, so I'm thinking that the recommended gap is on the conservative side.